Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Freon leak detectors trigger on R22, R134A, R404a, R410A and all halogenated refrigerants (including , CFC, HCFC and mixtures). Audible and gas leak indicator and dual battery indicator. Will react to all halogenation. This includes but is not limited to: After rotating the switch, the detector is for . 1-7 level selectable sensitivity Response time: Working temperature: 0-52 (30 to 125) The highest sensitivity to all halogenated refrigerants: 0.21oz/yr Battery life: about 50 hours of normal Operation mode: continuous and unlimited Fixed probe length: 7.87 (in) Dimensions: 1.37 x 1.37 x 5.90 inches Warm-up time: about 6 seconds Reset time: two to ten seconds supply: 6V DC, 4 AAA alkaline batteries. (not include) Colour: Black Material: Plastic Package Contents: 1 x detector Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.